superset 2021-08-02_21-14_6d20ba9ecb33_add_last_saved_at_to_slice_model 源码
superset 2021-08-02_21-14_6d20ba9ecb33_add_last_saved_at_to_slice_model 代码
文件路径：/superset/migrations/versions/2021-08-02_21-14_6d20ba9ecb33_add_last_saved_at_to_slice_model.py
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# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
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# software distributed under the License is distributed on an
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# KIND, either express or implied. See the License for the
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# under the License.
"""add_last_saved_at_to_slice_model
Revision ID: 6d20ba9ecb33
Revises: 'f6196627326f'
Create Date: 2021-08-02 21:14:58.200438
"""
# revision identifiers, used by Alembic.
revision = "6d20ba9ecb33"
down_revision = "f6196627326f"
import sqlalchemy as sa
from alembic import op
def upgrade():
with op.batch_alter_table("slices") as batch_op:
batch_op.add_column(sa.Column("last_saved_at", sa.DateTime(), nullable=True))
batch_op.add_column(sa.Column("last_saved_by_fk", sa.Integer(), nullable=True))
batch_op.create_foreign_key(
"slices_last_saved_by_fk", "ab_user", ["last_saved_by_fk"], ["id"]
)
# now do data migration, copy values from changed_on and changed_by
slices_table = sa.Table(
"slices",
sa.MetaData(),
sa.Column("changed_on", sa.DateTime(), nullable=True),
sa.Column("changed_by_fk", sa.Integer(), nullable=True),
sa.Column("last_saved_at", sa.DateTime(), nullable=True),
sa.Column("last_saved_by_fk", sa.Integer(), nullable=True),
)
conn = op.get_bind()
conn.execute(
slices_table.update().values(
last_saved_at=slices_table.c.changed_on,
last_saved_by_fk=slices_table.c.changed_by_fk,
)
)
# ### end Alembic commands ###
def downgrade():
with op.batch_alter_table("slices") as batch_op:
batch_op.drop_constraint("slices_last_saved_by_fk", type_="foreignkey")
batch_op.drop_column("last_saved_by_fk")
batch_op.drop_column("last_saved_at")
# ### end Alembic commands ###
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